Build 81


- Added a "Welcome" tab
- Renamed "Type" tab to "Demo", and added an educational header.
- When running in demo, "Next keyboard" button is hidden and "Dismiss" button is always available.
- When running in demo, the hint for next keyboard is not announced.
- New setting to customize your emoji shortcuts. You can now choose up to 6 of your favorite or most-used emojis.
- Bumped version to 2.0